I haven't checked to see where all I've seen it, but Best Buy (where I bought mine) had several of them, and I know I've seen the game elsewhere, so it's out there, you're just skipping over it.
As far as advertising, if there is any, I haven't seen it.
Either way, I agree with this article, the game is one of the best out of the 16 games I own (including popular favs like RE 4, Super Mario Galaxy, Super Paper Mario, Metroid, and others). It's only $40, too. I think the game will appeal more to people in my age group (25) who grew up playing King's Quest, Torrin's Passage, and other classic point-and-clicks, but it definitely gets a recommendation from me for any age group.